the.com/bow wave
The ocean's way of saying move over, something's coming through.
means The ridge of water a moving vessel pushes up and out ahead of its bow as it displaces water to pass through.
from Straightforward nautical compound — 'bow' for the front of a ship (from an old Germanic word for shoulder or bending timber, the curved part that cuts the water) plus 'wave.' Sailors and shipwrights needed no fancier word: the bow makes the wave, so that's its name. The term later drifted into physics and aerodynamics, describing the compression wave that forms ahead of any fast-moving object pushing through a fluid or even a crowd — the ocean usage came first and the metaphor spread from there.
- physics
- water piles up because it cannot get out of the way fast enough
- speed clue
- size scales with how fast the hull pushes forward
- energy cost
- pushing that wave wastes fuel, so designers hate it
- bonus use
- dolphins surf it for free speed without flapping a fin